First, I apologize if this answer is out there, but I've spent about 4 hours reading, testing, and I haven't found anything so far. Very strange issue.
Brand new installation of WordPress (3.3.1). After installation, going to the dashboard shows several signs of something not working correctly. Symptoms are...
1. On the main dashboard page, none of the 'call outs' work on the left menu. I.e. mouse over Pages, Posts, anything, and you don't get the "Show all, Add New" options. If you click 'Screen Options' on the top right, or 'Help', nothing changes.
2. The main page has the default sections for "Incoming Links", "Plugins", "WordPress Blog", etc. All of them say 'Loading...' and do not display content.
3. The visual editor does not display on pages and posts.
What I've looked at so far. This is running on a Linux/Apache/MySQL environment.
a. It's a brand new install, so I scrapped the installation, deleted the database tables, downloaded new files from wordpress.org and tried again completely after a few days of debugging the first installation. Same thing.
b. Yes, I am using the default theme. Never changed to anything else. It's Twenty Eleven.
c. I did not install any plugins, and all plugins that are installed by default are disabled.
d. php.ini has 32MB of memory and Apache has been restarted.
First time I've seen something like this. Any other ideas?